Leather Dining Chair
The Ergonomics of Armchair Design
Anthropometrically designed furniture is not a recent development, but can be traced back to the Egyptian period when the first palaces of pharaohs introduced the first raking-back chair. Ergonomics is the interaction between humans and their environment. As far as furniture design is concerned, the relationship is based on the function of the furniture and how your body responds to it.
The comfortably-designed Egyptian chair enables you to sit in an appropriate, reclined position and does not force you to sit in an upright manner. With the seat height taking care of the physiological length between the knee and the foot, your feet will not dangle in mid-air. During the Roman and Greek times, some chairs were accompanied by a footstool.
Furniture that are designed with ergonomics in mind, considers the back height, depth of the seat and the ability to tilt back in the seats, along with the adaptability of the chair to changes in the body’s position. It is also ensured that the seat and back are perpendicular to each other. The tilt of the back and the pitch of the seat are other factors taken into consideration.
As the angle between the seat and the back is increased from 90 degrees to 105 degrees, the person seated tends to derive more comfort as the pressure from tuberosities is relieved and distributed to the back. When the designer keeps the back-to-seat angle at 105 degrees, he can change the seat’s pitch off its horizontal plane from 5 degrees to 15 degrees, which works well for a recliner or an easy chair. As far as a stool or drawing chair is concerned, the pitch is fixed at 0 degrees or in a direct horizontal position, as it is essential to lean forward. For furniture and armchairs in Singapore and elsewhere which are designed for those with special needs, they deviate from these standard formulas and follows appropriate measurements.